<template>
  <div>
    <!-- 1-面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 2-卡片试图 -->
    <el-card>
      <!-- 提示 -->
      <el-alert
        title="添加商品信息"
        type="info"
        show-icon
        :closable="false"
        center
      >
      </el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <!-- 基本信息 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 级联选择器 -->
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="{
                  expandTrigger: 'hover',
                  label: 'cat_name',
                  value: 'cat_id',
                  chilren: 'chilren',
                }"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品参数 -->
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableDate"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="val"
                  v-for="(val, i) in item.attr_vals"
                  :key="i"
                  border
                >
                </el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品属性 -->
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableDate"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品图片 -->
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传到的后台api地址 -->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success="handleSuccess"
              list-type="picture"
              :headers="headerObj"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <!-- 商品内容 -->
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">
              添加商品
            </el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 3-图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
// 导入lodash组件
import _ from 'lodash'

export default {
  data() {
    return {
      // 步骤条被激活
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品分类所属的数组
        goods_cat: [],
        pics: [],
        // 商品详情描述
        goods_introduce: '',
        attrs: [],
      },
      // 表单验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品的名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品的价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品的重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品的数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' },
        ],
      },
      // 商品分类数据
      catelist: [],
      // 动态参数列表
      manyTableDate: [],
      // 静态参数列表
      onlyTableDate: [],
      // 上传图片的地址
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // upload组件上传图片的header请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      // 预览图片的位置
      previewPath: '',
      // 预览图片对话框的显示和隐藏
      previewVisible: false,
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取获取商品分类列表
    async getCateList() {
      const { data: result } = await this.$http.get('categories')
      if (result.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败')
      }
      this.catelist = result.data
      // console.log(this.catelist)
    },
    // 级联选择器选中项变化
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
      console.log(this.addForm.goods_cat)
    },
    // 标签页发生切换-使其完善信息从基本信息跳出到其他标签页
    beforeTabLeave(newactiveName, oldactiveName) {
      if (oldactiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请完成基本信息')
        return false
      }
    },
    // 点击标签页
    async tabClicked() {
      // 点击商品参数时-访问动态参数面板
      if (this.activeIndex === '1') {
        const { data: result } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' },
          }
        )
        if (result.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        result.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableDate = result.data
        // console.log(this.manyTableDate)
      }
      // 点击商品属性时-访问静态参数
      else if (this.activeIndex === '2') {
        const { data: result } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' },
          }
        )
        if (result.meta.status !== 200) {
          return this.$message.error('获取静态属性失败')
        }
        this.onlyTableDate = result.data
        // console.log(this.onlyTableDate)
      }
    },
    // 监听图片上传成功的事件
    handleSuccess(respoen) {
      const picInfo = { pic: respoen.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },
    // 图片移除事件
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const index = this.addForm.pics.findIndex((x) => {
        x.pic === filePath
      })
      this.addForm.pics.splice(index, 1)
      console.log(this.addForm)
    },
    // 图片预览事件
    handlePreview(file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 点击添加商品按钮_对整个表单进行预验证
    add() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 因为提交的表单good_cat必须为字符串，又不能直接改为字符串，会和级联选择器冲突
        const Form = _.cloneDeep(this.addForm)
        Form.goods_cat = Form.goods_cat.join(',')
        // console.log(Form)
        // 处理动态参数
        this.manyTableDate.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableDate.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(newInfo)
        })
        Form.attrs = this.addForm.attrs
        // 发起请求，添加商品
        const { data: result } = await this.$http.post('goods', Form)
        if (result.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
        // console.log(this.catelist)
      })
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>